The ornamental design for a vehicletailgate, as shown and described.
FIG. 1 is a front elevational view of a vehicle tailgate, showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top, front and left side perspective view thereof; and,
FIG. 7 is a bottom, front and left side perspective view thereof.
The claimed design is indicated by the relatively dark portions in the figures. The de-emphasized and relatively light portions form no part of the claimed design.